+++ /dev/null
-/* 3c574.c: A PCMCIA ethernet driver for the 3com 3c574 "RoadRunner".
-
- Written 1993-1998 by
- Donald Becker, becker@scyld.com, (driver core) and
- David Hinds, dahinds@users.sourceforge.net (from his PC card code).
- Locking fixes (C) Copyright 2003 Red Hat Inc
-
- This software may be used and distributed according to the terms of
- the GNU General Public License, incorporated herein by reference.
-
- This driver derives from Donald Becker's 3c509 core, which has the
- following copyright:
- Copyright 1993 United States Government as represented by the
- Director, National Security Agency.
-
-
-*/
-
-/*
- Theory of Operation
-
-I. Board Compatibility
-
-This device driver is designed for the 3Com 3c574 PC card Fast Ethernet
-Adapter.
-
-II. Board-specific settings
-
-None -- PC cards are autoconfigured.
-
-III. Driver operation
-
-The 3c574 uses a Boomerang-style interface, without the bus-master capability.
-See the Boomerang driver and documentation for most details.
-
-IV. Notes and chip documentation.
-
-Two added registers are used to enhance PIO performance, RunnerRdCtrl and
-RunnerWrCtrl. These are 11 bit down-counters that are preloaded with the
-count of word (16 bits) reads or writes the driver is about to do to the Rx
-or Tx FIFO. The chip is then able to hide the internal-PCI-bus to PC-card
-translation latency by buffering the I/O operations with an 8 word FIFO.
-Note: No other chip accesses are permitted when this buffer is used.
-
-A second enhancement is that both attribute and common memory space
-0x0800-0x0fff can translated to the PIO FIFO. Thus memory operations (faster
-with *some* PCcard bridges) may be used instead of I/O operations.
-This is enabled by setting the 0x10 bit in the PCMCIA LAN COR.
-
-Some slow PC card bridges work better if they never see a WAIT signal.
-This is configured by setting the 0x20 bit in the PCMCIA LAN COR.
-Only do this after testing that it is reliable and improves performance.
-
-The upper five bits of RunnerRdCtrl are used to window into PCcard
-configuration space registers. Window 0 is the regular Boomerang/Odie
-register set, 1-5 are various PC card control registers, and 16-31 are
-the (reversed!) CIS table.
-
-A final note: writing the InternalConfig register in window 3 with an
-invalid ramWidth is Very Bad.
-
-V. References
-
-http://www.scyld.com/expert/NWay.html
-http://www.national.com/opf/DP/DP83840A.html
-
-Thanks to Terry Murphy of 3Com for providing development information for
-earlier 3Com products.
-
-*/
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/in.h>
-#include <linux/delay.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/if_arp.h>
-#include <linux/ioport.h>
-#include <linux/bitops.h>
-#include <linux/mii.h>
-
-#include <pcmcia/cistpl.h>
-#include <pcmcia/cisreg.h>
-#include <pcmcia/ciscode.h>
-#include <pcmcia/ds.h>
-
-#include <linux/uaccess.h>
-#include <asm/io.h>
-
-/*====================================================================*/
-
-/* Module parameters */
-
-MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
-MODULE_DESCRIPTION("3Com 3c574 series PCMCIA ethernet driver");
-MODULE_LICENSE("GPL");
-
-#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
-
-/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
-INT_MODULE_PARM(max_interrupt_work, 32);
-
-/* Force full duplex modes? */
-INT_MODULE_PARM(full_duplex, 0);
-
-/* Autodetect link polarity reversal? */
-INT_MODULE_PARM(auto_polarity, 1);
-
-
-/*====================================================================*/
-
-/* Time in jiffies before concluding the transmitter is hung. */
-#define TX_TIMEOUT ((800*HZ)/1000)
-
-/* To minimize the size of the driver source and make the driver more
- readable not all constants are symbolically defined.
- You'll need the manual if you want to understand driver details anyway. */
-/* Offsets from base I/O address. */
-#define EL3_DATA 0x00
-#define EL3_CMD 0x0e
-#define EL3_STATUS 0x0e
-
-#define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
-
-/* The top five bits written to EL3_CMD are a command, the lower
- 11 bits are the parameter, if applicable. */
-enum el3_cmds {
- TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11,
- RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11,
- TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
- FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
- SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
- SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11,
- StatsDisable = 22<<11, StopCoax = 23<<11,
-};
-
-enum elxl_status {
- IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
- TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
- IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000 };
-
-/* The SetRxFilter command accepts the following classes: */
-enum RxFilter {
- RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
-};
-
-enum Window0 {
- Wn0EepromCmd = 10, Wn0EepromData = 12, /* EEPROM command/address, data. */
- IntrStatus=0x0E, /* Valid in all windows. */
-};
-/* These assumes the larger EEPROM. */
-enum Win0_EEPROM_cmds {
- EEPROM_Read = 0x200, EEPROM_WRITE = 0x100, EEPROM_ERASE = 0x300,
- EEPROM_EWENB = 0x30, /* Enable erasing/writing for 10 msec. */
- EEPROM_EWDIS = 0x00, /* Disable EWENB before 10 msec timeout. */
-};
-
-/* Register window 1 offsets, the window used in normal operation.
- On the "Odie" this window is always mapped at offsets 0x10-0x1f.
- Except for TxFree, which is overlapped by RunnerWrCtrl. */
-enum Window1 {
- TX_FIFO = 0x10, RX_FIFO = 0x10, RxErrors = 0x14,
- RxStatus = 0x18, Timer=0x1A, TxStatus = 0x1B,
- TxFree = 0x0C, /* Remaining free bytes in Tx buffer. */
- RunnerRdCtrl = 0x16, RunnerWrCtrl = 0x1c,
-};
-
-enum Window3 { /* Window 3: MAC/config bits. */
- Wn3_Config=0, Wn3_MAC_Ctrl=6, Wn3_Options=8,
-};
-enum wn3_config {
- Ram_size = 7,
- Ram_width = 8,
- Ram_speed = 0x30,
- Rom_size = 0xc0,
- Ram_split_shift = 16,
- Ram_split = 3 << Ram_split_shift,
- Xcvr_shift = 20,
- Xcvr = 7 << Xcvr_shift,
- Autoselect = 0x1000000,
-};
-
-enum Window4 { /* Window 4: Xcvr/media bits. */
- Wn4_FIFODiag = 4, Wn4_NetDiag = 6, Wn4_PhysicalMgmt=8, Wn4_Media = 10,
-};
-
-#define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
-
-struct el3_private {
- struct pcmcia_device *p_dev;
- u16 advertising, partner; /* NWay media advertisement */
- unsigned char phys; /* MII device address */
- unsigned int autoselect:1, default_media:3; /* Read from the EEPROM/Wn3_Config. */
- /* for transceiver monitoring */
- struct timer_list media;
- unsigned short media_status;
- unsigned short fast_poll;
- unsigned long last_irq;
- spinlock_t window_lock; /* Guards the Window selection */
-};
-
-/* Set iff a MII transceiver on any interface requires mdio preamble.
- This only set with the original DP83840 on older 3c905 boards, so the extra
- code size of a per-interface flag is not worthwhile. */
-static char mii_preamble_required = 0;
-
-/* Index of functions. */
-
-static int tc574_config(struct pcmcia_device *link);
-static void tc574_release(struct pcmcia_device *link);
-
-static void mdio_sync(unsigned int ioaddr, int bits);
-static int mdio_read(unsigned int ioaddr, int phy_id, int location);
-static void mdio_write(unsigned int ioaddr, int phy_id, int location,
- int value);
-static unsigned short read_eeprom(unsigned int ioaddr, int index);
-static void tc574_wait_for_completion(struct net_device *dev, int cmd);
-
-static void tc574_reset(struct net_device *dev);
-static void media_check(struct timer_list *t);
-static int el3_open(struct net_device *dev);
-static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
- struct net_device *dev);
-static irqreturn_t el3_interrupt(int irq, void *dev_id);
-static void update_stats(struct net_device *dev);
-static struct net_device_stats *el3_get_stats(struct net_device *dev);
-static int el3_rx(struct net_device *dev, int worklimit);
-static int el3_close(struct net_device *dev);
-static void el3_tx_timeout(struct net_device *dev, unsigned int txqueue);
-static int el3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
-static void set_rx_mode(struct net_device *dev);
-static void set_multicast_list(struct net_device *dev);
-
-static void tc574_detach(struct pcmcia_device *p_dev);
-
-/*
- tc574_attach() creates an "instance" of the driver, allocating
- local data structures for one device. The device is registered
- with Card Services.
-*/
-static const struct net_device_ops el3_netdev_ops = {
- .ndo_open = el3_open,
- .ndo_stop = el3_close,
- .ndo_start_xmit = el3_start_xmit,
- .ndo_tx_timeout = el3_tx_timeout,
- .ndo_get_stats = el3_get_stats,
- .ndo_eth_ioctl = el3_ioctl,
- .ndo_set_rx_mode = set_multicast_list,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-static int tc574_probe(struct pcmcia_device *link)
-{
- struct el3_private *lp;
- struct net_device *dev;
-
- dev_dbg(&link->dev, "3c574_attach()\n");
-
- /* Create the PC card device object. */
- dev = alloc_etherdev(sizeof(struct el3_private));
- if (!dev)
- return -ENOMEM;
- lp = netdev_priv(dev);
- link->priv = dev;
- lp->p_dev = link;
-
- spin_lock_init(&lp->window_lock);
- link->resource[0]->end = 32;
- link->resource[0]->flags |= IO_DATA_PATH_WIDTH_16;
- link->config_flags |= CONF_ENABLE_IRQ;
- link->config_index = 1;
-
- dev->netdev_ops = &el3_netdev_ops;
- dev->watchdog_timeo = TX_TIMEOUT;
-
- return tc574_config(link);
-}
-
-static void tc574_detach(struct pcmcia_device *link)
-{
- struct net_device *dev = link->priv;
-
- dev_dbg(&link->dev, "3c574_detach()\n");
-
- unregister_netdev(dev);
-
- tc574_release(link);
-
- free_netdev(dev);
-} /* tc574_detach */
-
-static const char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
-
-static int tc574_config(struct pcmcia_device *link)
-{
- struct net_device *dev = link->priv;
- struct el3_private *lp = netdev_priv(dev);
- int ret, i, j;
- __be16 addr[ETH_ALEN / 2];
- unsigned int ioaddr;
- char *cardname;
- __u32 config;
- u8 *buf;
- size_t len;
-
- dev_dbg(&link->dev, "3c574_config()\n");
-
- link->io_lines = 16;
-
- for (i = j = 0; j < 0x400; j += 0x20) {
- link->resource[0]->start = j ^ 0x300;
- i = pcmcia_request_io(link);
- if (i == 0)
- break;
- }
- if (i != 0)
- goto failed;
-
- ret = pcmcia_request_irq(link, el3_interrupt);
- if (ret)
- goto failed;
-
- ret = pcmcia_enable_device(link);
- if (ret)
- goto failed;
-
- dev->irq = link->irq;
- dev->base_addr = link->resource[0]->start;
-
- ioaddr = dev->base_addr;
-
- /* The 3c574 normally uses an EEPROM for configuration info, including
- the hardware address. The future products may include a modem chip
- and put the address in the CIS. */
-
- len = pcmcia_get_tuple(link, 0x88, &buf);
- if (buf && len >= 6) {
- for (i = 0; i < 3; i++)
- addr[i] = htons(le16_to_cpu(buf[i * 2]));
- kfree(buf);
- } else {
- kfree(buf); /* 0 < len < 6 */
- EL3WINDOW(0);
- for (i = 0; i < 3; i++)
- addr[i] = htons(read_eeprom(ioaddr, i + 10));
- if (addr[0] == htons(0x6060)) {
- pr_notice("IO port conflict at 0x%03lx-0x%03lx\n",
- dev->base_addr, dev->base_addr+15);
- goto failed;
- }
- }
- eth_hw_addr_set(dev, (u8 *)addr);
- if (link->prod_id[1])
- cardname = link->prod_id[1];
- else
- cardname = "3Com 3c574";
-
- {
- u_char mcr;
- outw(2<<11, ioaddr + RunnerRdCtrl);
- mcr = inb(ioaddr + 2);
- outw(0<<11, ioaddr + RunnerRdCtrl);
- pr_info(" ASIC rev %d,", mcr>>3);
- EL3WINDOW(3);
- config = inl(ioaddr + Wn3_Config);
- lp->default_media = (config & Xcvr) >> Xcvr_shift;
- lp->autoselect = config & Autoselect ? 1 : 0;
- }
-
- timer_setup(&lp->media, media_check, 0);
-
- {
- int phy;
-
- /* Roadrunner only: Turn on the MII transceiver */
- outw(0x8040, ioaddr + Wn3_Options);
- mdelay(1);
- outw(0xc040, ioaddr + Wn3_Options);
- tc574_wait_for_completion(dev, TxReset);
- tc574_wait_for_completion(dev, RxReset);
- mdelay(1);
- outw(0x8040, ioaddr + Wn3_Options);
-
- EL3WINDOW(4);
- for (phy = 1; phy <= 32; phy++) {
- int mii_status;
- mdio_sync(ioaddr, 32);
- mii_status = mdio_read(ioaddr, phy & 0x1f, 1);
- if (mii_status != 0xffff) {
- lp->phys = phy & 0x1f;
- dev_dbg(&link->dev, " MII transceiver at "
- "index %d, status %x.\n",
- phy, mii_status);
- if ((mii_status & 0x0040) == 0)
- mii_preamble_required = 1;
- break;
- }
- }
- if (phy > 32) {
- pr_notice(" No MII transceivers found!\n");
- goto failed;
- }
- i = mdio_read(ioaddr, lp->phys, 16) | 0x40;
- mdio_write(ioaddr, lp->phys, 16, i);
- lp->advertising = mdio_read(ioaddr, lp->phys, 4);
- if (full_duplex) {
- /* Only advertise the FD media types. */
- lp->advertising &= ~0x02a0;
- mdio_write(ioaddr, lp->phys, 4, lp->advertising);
- }
- }
-
- SET_NETDEV_DEV(dev, &link->dev);
-
- if (register_netdev(dev) != 0) {
- pr_notice("register_netdev() failed\n");
- goto failed;
- }
-
- netdev_info(dev, "%s at io %#3lx, irq %d, hw_addr %pM\n",
- cardname, dev->base_addr, dev->irq, dev->dev_addr);
- netdev_info(dev, " %dK FIFO split %s Rx:Tx, %sMII interface.\n",
- 8 << (config & Ram_size),
- ram_split[(config & Ram_split) >> Ram_split_shift],
- config & Autoselect ? "autoselect " : "");
-
- return 0;
-
-failed:
- tc574_release(link);
- return -ENODEV;
-
-} /* tc574_config */
-
-static void tc574_release(struct pcmcia_device *link)
-{
- pcmcia_disable_device(link);
-}
-
-static int tc574_suspend(struct pcmcia_device *link)
-{
- struct net_device *dev = link->priv;
-
- if (link->open)
- netif_device_detach(dev);
-
- return 0;
-}
-
-static int tc574_resume(struct pcmcia_device *link)
-{
- struct net_device *dev = link->priv;
-
- if (link->open) {
- tc574_reset(dev);
- netif_device_attach(dev);
- }
-
- return 0;
-}
-
-static void dump_status(struct net_device *dev)
-{
- unsigned int ioaddr = dev->base_addr;
- EL3WINDOW(1);
- netdev_info(dev, " irq status %04x, rx status %04x, tx status %02x, tx free %04x\n",
- inw(ioaddr+EL3_STATUS),
- inw(ioaddr+RxStatus), inb(ioaddr+TxStatus),
- inw(ioaddr+TxFree));
- EL3WINDOW(4);
- netdev_info(dev, " diagnostics: fifo %04x net %04x ethernet %04x media %04x\n",
- inw(ioaddr+0x04), inw(ioaddr+0x06),
- inw(ioaddr+0x08), inw(ioaddr+0x0a));
- EL3WINDOW(1);
-}
-
-/*
- Use this for commands that may take time to finish
-*/
-static void tc574_wait_for_completion(struct net_device *dev, int cmd)
-{
- int i = 1500;
- outw(cmd, dev->base_addr + EL3_CMD);
- while (--i > 0)
- if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
- if (i == 0)
- netdev_notice(dev, "command 0x%04x did not complete!\n", cmd);
-}
-
-/* Read a word from the EEPROM using the regular EEPROM access register.
- Assume that we are in register window zero.
- */
-static unsigned short read_eeprom(unsigned int ioaddr, int index)
-{
- int timer;
- outw(EEPROM_Read + index, ioaddr + Wn0EepromCmd);
- /* Pause for at least 162 usec for the read to take place. */
- for (timer = 1620; timer >= 0; timer--) {
- if ((inw(ioaddr + Wn0EepromCmd) & 0x8000) == 0)
- break;
- }
- return inw(ioaddr + Wn0EepromData);
-}
-
-/* MII transceiver control section.
- Read and write the MII registers using software-generated serial
- MDIO protocol. See the MII specifications or DP83840A data sheet
- for details.
- The maxium data clock rate is 2.5 Mhz. The timing is easily met by the
- slow PC card interface. */
-
-#define MDIO_SHIFT_CLK 0x01
-#define MDIO_DIR_WRITE 0x04
-#define MDIO_DATA_WRITE0 (0x00 | MDIO_DIR_WRITE)
-#define MDIO_DATA_WRITE1 (0x02 | MDIO_DIR_WRITE)
-#define MDIO_DATA_READ 0x02
-#define MDIO_ENB_IN 0x00
-
-/* Generate the preamble required for initial synchronization and
- a few older transceivers. */
-static void mdio_sync(unsigned int ioaddr, int bits)
-{
- unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt;
-
- /* Establish sync by sending at least 32 logic ones. */
- while (-- bits >= 0) {
- outw(MDIO_DATA_WRITE1, mdio_addr);
- outw(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
- }
-}
-
-static int mdio_read(unsigned int ioaddr, int phy_id, int location)
-{
- int i;
- int read_cmd = (0xf6 << 10) | (phy_id << 5) | location;
- unsigned int retval = 0;
- unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt;
-
- if (mii_preamble_required)
- mdio_sync(ioaddr, 32);
-
- /* Shift the read command bits out. */
- for (i = 14; i >= 0; i--) {
- int dataval = (read_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
- outw(dataval, mdio_addr);
- outw(dataval | MDIO_SHIFT_CLK, mdio_addr);
- }
- /* Read the two transition, 16 data, and wire-idle bits. */
- for (i = 19; i > 0; i--) {
- outw(MDIO_ENB_IN, mdio_addr);
- retval = (retval << 1) | ((inw(mdio_addr) & MDIO_DATA_READ) ? 1 : 0);
- outw(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
- }
- return (retval>>1) & 0xffff;
-}
-
-static void mdio_write(unsigned int ioaddr, int phy_id, int location, int value)
-{
- int write_cmd = 0x50020000 | (phy_id << 23) | (location << 18) | value;
- unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt;
- int i;
-
- if (mii_preamble_required)
- mdio_sync(ioaddr, 32);
-
- /* Shift the command bits out. */
- for (i = 31; i >= 0; i--) {
- int dataval = (write_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
- outw(dataval, mdio_addr);
- outw(dataval | MDIO_SHIFT_CLK, mdio_addr);
- }
- /* Leave the interface idle. */
- for (i = 1; i >= 0; i--) {
- outw(MDIO_ENB_IN, mdio_addr);
- outw(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
- }
-}
-
-/* Reset and restore all of the 3c574 registers. */
-static void tc574_reset(struct net_device *dev)
-{
- struct el3_private *lp = netdev_priv(dev);
- int i;
- unsigned int ioaddr = dev->base_addr;
- unsigned long flags;
-
- tc574_wait_for_completion(dev, TotalReset|0x10);
-
- spin_lock_irqsave(&lp->window_lock, flags);
- /* Clear any transactions in progress. */
- outw(0, ioaddr + RunnerWrCtrl);
- outw(0, ioaddr + RunnerRdCtrl);
-
- /* Set the station address and mask. */
- EL3WINDOW(2);
- for (i = 0; i < 6; i++)
- outb(dev->dev_addr[i], ioaddr + i);
- for (; i < 12; i+=2)
- outw(0, ioaddr + i);
-
- /* Reset config options */
- EL3WINDOW(3);
- outb((dev->mtu > 1500 ? 0x40 : 0), ioaddr + Wn3_MAC_Ctrl);
- outl((lp->autoselect ? 0x01000000 : 0) | 0x0062001b,
- ioaddr + Wn3_Config);
- /* Roadrunner only: Turn on the MII transceiver. */
- outw(0x8040, ioaddr + Wn3_Options);
- mdelay(1);
- outw(0xc040, ioaddr + Wn3_Options);
- EL3WINDOW(1);
- spin_unlock_irqrestore(&lp->window_lock, flags);
-
- tc574_wait_for_completion(dev, TxReset);
- tc574_wait_for_completion(dev, RxReset);
- mdelay(1);
- spin_lock_irqsave(&lp->window_lock, flags);
- EL3WINDOW(3);
- outw(0x8040, ioaddr + Wn3_Options);
-
- /* Switch to the stats window, and clear all stats by reading. */
- outw(StatsDisable, ioaddr + EL3_CMD);
- EL3WINDOW(6);
- for (i = 0; i < 10; i++)
- inb(ioaddr + i);
- inw(ioaddr + 10);
- inw(ioaddr + 12);
- EL3WINDOW(4);
- inb(ioaddr + 12);
- inb(ioaddr + 13);
-
- /* .. enable any extra statistics bits.. */
- outw(0x0040, ioaddr + Wn4_NetDiag);
-
- EL3WINDOW(1);
- spin_unlock_irqrestore(&lp->window_lock, flags);
-
- /* .. re-sync MII and re-fill what NWay is advertising. */
- mdio_sync(ioaddr, 32);
- mdio_write(ioaddr, lp->phys, 4, lp->advertising);
- if (!auto_polarity) {
- /* works for TDK 78Q2120 series MII's */
- i = mdio_read(ioaddr, lp->phys, 16) | 0x20;
- mdio_write(ioaddr, lp->phys, 16, i);
- }
-
- spin_lock_irqsave(&lp->window_lock, flags);
- /* Switch to register set 1 for normal use, just for TxFree. */
- set_rx_mode(dev);
- spin_unlock_irqrestore(&lp->window_lock, flags);
- outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
- outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
- outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
- /* Allow status bits to be seen. */
- outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
- /* Ack all pending events, and set active indicator mask. */
- outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
- ioaddr + EL3_CMD);
- outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
- | AdapterFailure | RxEarly, ioaddr + EL3_CMD);
-}
-
-static int el3_open(struct net_device *dev)
-{
- struct el3_private *lp = netdev_priv(dev);
- struct pcmcia_device *link = lp->p_dev;
-
- if (!pcmcia_dev_present(link))
- return -ENODEV;
-
- link->open++;
- netif_start_queue(dev);
-
- tc574_reset(dev);
- lp->media.expires = jiffies + HZ;
- add_timer(&lp->media);
-
- dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
- dev->name, inw(dev->base_addr + EL3_STATUS));
-
- return 0;
-}
-
-static void el3_tx_timeout(struct net_device *dev, unsigned int txqueue)
-{
- unsigned int ioaddr = dev->base_addr;
-
- netdev_notice(dev, "Transmit timed out!\n");
- dump_status(dev);
- dev->stats.tx_errors++;
- netif_trans_update(dev); /* prevent tx timeout */
- /* Issue TX_RESET and TX_START commands. */
- tc574_wait_for_completion(dev, TxReset);
- outw(TxEnable, ioaddr + EL3_CMD);
- netif_wake_queue(dev);
-}
-
-static void pop_tx_status(struct net_device *dev)
-{
- unsigned int ioaddr = dev->base_addr;
- int i;
-
- /* Clear the Tx status stack. */
- for (i = 32; i > 0; i--) {
- u_char tx_status = inb(ioaddr + TxStatus);
- if (!(tx_status & 0x84))
- break;
- /* reset transmitter on jabber error or underrun */
- if (tx_status & 0x30)
- tc574_wait_for_completion(dev, TxReset);
- if (tx_status & 0x38) {
- pr_debug("%s: transmit error: status 0x%02x\n",
- dev->name, tx_status);
- outw(TxEnable, ioaddr + EL3_CMD);
- dev->stats.tx_aborted_errors++;
- }
- outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */
- }
-}
-
-static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
- struct net_device *dev)
-{
- unsigned int ioaddr = dev->base_addr;
- struct el3_private *lp = netdev_priv(dev);
- unsigned long flags;
-
- pr_debug("%s: el3_start_xmit(length = %ld) called, "
- "status %4.4x.\n", dev->name, (long)skb->len,
- inw(ioaddr + EL3_STATUS));
-
- spin_lock_irqsave(&lp->window_lock, flags);
-
- dev->stats.tx_bytes += skb->len;
-
- /* Put out the doubleword header... */
- outw(skb->len, ioaddr + TX_FIFO);
- outw(0, ioaddr + TX_FIFO);
- /* ... and the packet rounded to a doubleword. */
- outsl(ioaddr + TX_FIFO, skb->data, (skb->len+3)>>2);
-
- /* TxFree appears only in Window 1, not offset 0x1c. */
- if (inw(ioaddr + TxFree) <= 1536) {
- netif_stop_queue(dev);
- /* Interrupt us when the FIFO has room for max-sized packet.
- The threshold is in units of dwords. */
- outw(SetTxThreshold + (1536>>2), ioaddr + EL3_CMD);
- }
-
- pop_tx_status(dev);
- spin_unlock_irqrestore(&lp->window_lock, flags);
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
-}
-
-/* The EL3 interrupt handler. */
-static irqreturn_t el3_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev = (struct net_device *) dev_id;
- struct el3_private *lp = netdev_priv(dev);
- unsigned int ioaddr;
- unsigned status;
- int work_budget = max_interrupt_work;
- int handled = 0;
-
- if (!netif_device_present(dev))
- return IRQ_NONE;
- ioaddr = dev->base_addr;
-
- pr_debug("%s: interrupt, status %4.4x.\n",
- dev->name, inw(ioaddr + EL3_STATUS));
-
- spin_lock(&lp->window_lock);
-
- while ((status = inw(ioaddr + EL3_STATUS)) &
- (IntLatch | RxComplete | RxEarly | StatsFull)) {
- if (!netif_device_present(dev) ||
- ((status & 0xe000) != 0x2000)) {
- pr_debug("%s: Interrupt from dead card\n", dev->name);
- break;
- }
-
- handled = 1;
-
- if (status & RxComplete)
- work_budget = el3_rx(dev, work_budget);
-
- if (status & TxAvailable) {
- pr_debug(" TX room bit was handled.\n");
- /* There's room in the FIFO for a full-sized packet. */
- outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
- netif_wake_queue(dev);
- }
-
- if (status & TxComplete)
- pop_tx_status(dev);
-
- if (status & (AdapterFailure | RxEarly | StatsFull)) {
- /* Handle all uncommon interrupts. */
- if (status & StatsFull)
- update_stats(dev);
- if (status & RxEarly) {
- work_budget = el3_rx(dev, work_budget);
- outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
- }
- if (status & AdapterFailure) {
- u16 fifo_diag;
- EL3WINDOW(4);
- fifo_diag = inw(ioaddr + Wn4_FIFODiag);
- EL3WINDOW(1);
- netdev_notice(dev, "adapter failure, FIFO diagnostic register %04x\n",
- fifo_diag);
- if (fifo_diag & 0x0400) {
- /* Tx overrun */
- tc574_wait_for_completion(dev, TxReset);
- outw(TxEnable, ioaddr + EL3_CMD);
- }
- if (fifo_diag & 0x2000) {
- /* Rx underrun */
- tc574_wait_for_completion(dev, RxReset);
- set_rx_mode(dev);
- outw(RxEnable, ioaddr + EL3_CMD);
- }
- outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
- }
- }
-
- if (--work_budget < 0) {
- pr_debug("%s: Too much work in interrupt, "
- "status %4.4x.\n", dev->name, status);
- /* Clear all interrupts */
- outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
- break;
- }
- /* Acknowledge the IRQ. */
- outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
- }
-
- pr_debug("%s: exiting interrupt, status %4.4x.\n",
- dev->name, inw(ioaddr + EL3_STATUS));
-
- spin_unlock(&lp->window_lock);
- return IRQ_RETVAL(handled);
-}
-
-/*
- This timer serves two purposes: to check for missed interrupts
- (and as a last resort, poll the NIC for events), and to monitor
- the MII, reporting changes in cable status.
-*/
-static void media_check(struct timer_list *t)
-{
- struct el3_private *lp = timer_container_of(lp, t, media);
- struct net_device *dev = lp->p_dev->priv;
- unsigned int ioaddr = dev->base_addr;
- unsigned long flags;
- unsigned short /* cable, */ media, partner;
-
- if (!netif_device_present(dev))
- goto reschedule;
-
- /* Check for pending interrupt with expired latency timer: with
- this, we can limp along even if the interrupt is blocked */
- if ((inw(ioaddr + EL3_STATUS) & IntLatch) && (inb(ioaddr + Timer) == 0xff)) {
- if (!lp->fast_poll)
- netdev_info(dev, "interrupt(s) dropped!\n");
-
- local_irq_save(flags);
- el3_interrupt(dev->irq, dev);
- local_irq_restore(flags);
-
- lp->fast_poll = HZ;
- }
- if (lp->fast_poll) {
- lp->fast_poll--;
- lp->media.expires = jiffies + 2*HZ/100;
- add_timer(&lp->media);
- return;
- }
-
- spin_lock_irqsave(&lp->window_lock, flags);
- EL3WINDOW(4);
- media = mdio_read(ioaddr, lp->phys, 1);
- partner = mdio_read(ioaddr, lp->phys, 5);
- EL3WINDOW(1);
-
- if (media != lp->media_status) {
- if ((media ^ lp->media_status) & 0x0004)
- netdev_info(dev, "%s link beat\n",
- (lp->media_status & 0x0004) ? "lost" : "found");
- if ((media ^ lp->media_status) & 0x0020) {
- lp->partner = 0;
- if (lp->media_status & 0x0020) {
- netdev_info(dev, "autonegotiation restarted\n");
- } else if (partner) {
- partner &= lp->advertising;
- lp->partner = partner;
- netdev_info(dev, "autonegotiation complete: "
- "%dbaseT-%cD selected\n",
- (partner & 0x0180) ? 100 : 10,
- (partner & 0x0140) ? 'F' : 'H');
- } else {
- netdev_info(dev, "link partner did not autonegotiate\n");
- }
-
- EL3WINDOW(3);
- outb((partner & 0x0140 ? 0x20 : 0) |
- (dev->mtu > 1500 ? 0x40 : 0), ioaddr + Wn3_MAC_Ctrl);
- EL3WINDOW(1);
-
- }
- if (media & 0x0010)
- netdev_info(dev, "remote fault detected\n");
- if (media & 0x0002)
- netdev_info(dev, "jabber detected\n");
- lp->media_status = media;
- }
- spin_unlock_irqrestore(&lp->window_lock, flags);
-
-reschedule:
- lp->media.expires = jiffies + HZ;
- add_timer(&lp->media);
-}
-
-static struct net_device_stats *el3_get_stats(struct net_device *dev)
-{
- struct el3_private *lp = netdev_priv(dev);
-
- if (netif_device_present(dev)) {
- unsigned long flags;
- spin_lock_irqsave(&lp->window_lock, flags);
- update_stats(dev);
- spin_unlock_irqrestore(&lp->window_lock, flags);
- }
- return &dev->stats;
-}
-
-/* Update statistics.
- Surprisingly this need not be run single-threaded, but it effectively is.
- The counters clear when read, so the adds must merely be atomic.
- */
-static void update_stats(struct net_device *dev)
-{
- unsigned int ioaddr = dev->base_addr;
- u8 up;
-
- pr_debug("%s: updating the statistics.\n", dev->name);
-
- if (inw(ioaddr+EL3_STATUS) == 0xffff) /* No card. */
- return;
-
- /* Unlike the 3c509 we need not turn off stats updates while reading. */
- /* Switch to the stats window, and read everything. */
- EL3WINDOW(6);
- dev->stats.tx_carrier_errors += inb(ioaddr + 0);
- dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
- /* Multiple collisions. */ inb(ioaddr + 2);
- dev->stats.collisions += inb(ioaddr + 3);
- dev->stats.tx_window_errors += inb(ioaddr + 4);
- dev->stats.rx_fifo_errors += inb(ioaddr + 5);
- dev->stats.tx_packets += inb(ioaddr + 6);
- up = inb(ioaddr + 9);
- dev->stats.tx_packets += (up&0x30) << 4;
- /* Rx packets */ inb(ioaddr + 7);
- /* Tx deferrals */ inb(ioaddr + 8);
- /* rx */ inw(ioaddr + 10);
- /* tx */ inw(ioaddr + 12);
-
- EL3WINDOW(4);
- /* BadSSD */ inb(ioaddr + 12);
- up = inb(ioaddr + 13);
-
- EL3WINDOW(1);
-}
-
-static int el3_rx(struct net_device *dev, int worklimit)
-{
- unsigned int ioaddr = dev->base_addr;
- short rx_status;
-
- pr_debug("%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
- dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RxStatus));
- while (!((rx_status = inw(ioaddr + RxStatus)) & 0x8000) &&
- worklimit > 0) {
- worklimit--;
- if (rx_status & 0x4000) { /* Error, update stats. */
- short error = rx_status & 0x3800;
- dev->stats.rx_errors++;
- switch (error) {
- case 0x0000: dev->stats.rx_over_errors++; break;
- case 0x0800: dev->stats.rx_length_errors++; break;
- case 0x1000: dev->stats.rx_frame_errors++; break;
- case 0x1800: dev->stats.rx_length_errors++; break;
- case 0x2000: dev->stats.rx_frame_errors++; break;
- case 0x2800: dev->stats.rx_crc_errors++; break;
- }
- } else {
- short pkt_len = rx_status & 0x7ff;
- struct sk_buff *skb;
-
- skb = netdev_alloc_skb(dev, pkt_len + 5);
-
- pr_debug(" Receiving packet size %d status %4.4x.\n",
- pkt_len, rx_status);
- if (skb != NULL) {
- skb_reserve(skb, 2);
- insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
- ((pkt_len+3)>>2));
- skb->protocol = eth_type_trans(skb, dev);
- netif_rx(skb);
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += pkt_len;
- } else {
- pr_debug("%s: couldn't allocate a sk_buff of"
- " size %d.\n", dev->name, pkt_len);
- dev->stats.rx_dropped++;
- }
- }
- tc574_wait_for_completion(dev, RxDiscard);
- }
-
- return worklimit;
-}
-
-/* Provide ioctl() calls to examine the MII xcvr state. */
-static int el3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
-{
- struct el3_private *lp = netdev_priv(dev);
- unsigned int ioaddr = dev->base_addr;
- struct mii_ioctl_data *data = if_mii(rq);
- int phy = lp->phys & 0x1f;
-
- pr_debug("%s: In ioct(%-.6s, %#4.4x) %4.4x %4.4x %4.4x %4.4x.\n",
- dev->name, rq->ifr_ifrn.ifrn_name, cmd,
- data->phy_id, data->reg_num, data->val_in, data->val_out);
-
- switch(cmd) {
- case SIOCGMIIPHY: /* Get the address of the PHY in use. */
- data->phy_id = phy;
- fallthrough;
- case SIOCGMIIREG: /* Read the specified MII register. */
- {
- int saved_window;
- unsigned long flags;
-
- spin_lock_irqsave(&lp->window_lock, flags);
- saved_window = inw(ioaddr + EL3_CMD) >> 13;
- EL3WINDOW(4);
- data->val_out = mdio_read(ioaddr, data->phy_id & 0x1f,
- data->reg_num & 0x1f);
- EL3WINDOW(saved_window);
- spin_unlock_irqrestore(&lp->window_lock, flags);
- return 0;
- }
- case SIOCSMIIREG: /* Write the specified MII register */
- {
- int saved_window;
- unsigned long flags;
-
- spin_lock_irqsave(&lp->window_lock, flags);
- saved_window = inw(ioaddr + EL3_CMD) >> 13;
- EL3WINDOW(4);
- mdio_write(ioaddr, data->phy_id & 0x1f,
- data->reg_num & 0x1f, data->val_in);
- EL3WINDOW(saved_window);
- spin_unlock_irqrestore(&lp->window_lock, flags);
- return 0;
- }
- default:
- return -EOPNOTSUPP;
- }
-}
-
-/* The Odie chip has a 64 bin multicast filter, but the bit layout is not
- documented. Until it is we revert to receiving all multicast frames when
- any multicast reception is desired.
- Note: My other drivers emit a log message whenever promiscuous mode is
- entered to help detect password sniffers. This is less desirable on
- typical PC card machines, so we omit the message.
- */
-
-static void set_rx_mode(struct net_device *dev)
-{
- unsigned int ioaddr = dev->base_addr;
-
- if (dev->flags & IFF_PROMISC)
- outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm,
- ioaddr + EL3_CMD);
- else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI))
- outw(SetRxFilter|RxStation|RxMulticast|RxBroadcast, ioaddr + EL3_CMD);
- else
- outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD);
-}
-
-static void set_multicast_list(struct net_device *dev)
-{
- struct el3_private *lp = netdev_priv(dev);
- unsigned long flags;
-
- spin_lock_irqsave(&lp->window_lock, flags);
- set_rx_mode(dev);
- spin_unlock_irqrestore(&lp->window_lock, flags);
-}
-
-static int el3_close(struct net_device *dev)
-{
- unsigned int ioaddr = dev->base_addr;
- struct el3_private *lp = netdev_priv(dev);
- struct pcmcia_device *link = lp->p_dev;
-
- dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
-
- if (pcmcia_dev_present(link)) {
- unsigned long flags;
-
- /* Turn off statistics ASAP. We update lp->stats below. */
- outw(StatsDisable, ioaddr + EL3_CMD);
-
- /* Disable the receiver and transmitter. */
- outw(RxDisable, ioaddr + EL3_CMD);
- outw(TxDisable, ioaddr + EL3_CMD);
-
- /* Note: Switching to window 0 may disable the IRQ. */
- EL3WINDOW(0);
- spin_lock_irqsave(&lp->window_lock, flags);
- update_stats(dev);
- spin_unlock_irqrestore(&lp->window_lock, flags);
-
- /* force interrupts off */
- outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD);
- }
-
- link->open--;
- netif_stop_queue(dev);
- timer_delete_sync(&lp->media);
-
- return 0;
-}
-
-static const struct pcmcia_device_id tc574_ids[] = {
- PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0574),
- PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0556, "cis/3CCFEM556.cis"),
- PCMCIA_DEVICE_NULL,
-};
-MODULE_DEVICE_TABLE(pcmcia, tc574_ids);
-
-static struct pcmcia_driver tc574_driver = {
- .owner = THIS_MODULE,
- .name = "3c574_cs",
- .probe = tc574_probe,
- .remove = tc574_detach,
- .id_table = tc574_ids,
- .suspend = tc574_suspend,
- .resume = tc574_resume,
-};
-module_pcmcia_driver(tc574_driver);
projects / thirdparty / linux.git / commitdiff
